GUIDE FOR OFFICE LIGHTING OPTICS - LEDIL
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GUIDE FOR OFFICE LIGHTING OPTICS ver. 1.1 / 2020
OFFICE LIGHTING IN A NUTSHELL GLARE
Glare is the sensation of visual discomfort caused by areas that are too bright within the field of vision, such as lit
Offices consist of many different types of rooms and areas: work areas, public areas, surfaces, parts of luminaires, windows and/or ceiling. Glare should be limited to avoid fatigue, discomfort and
hallways, meeting rooms, showrooms, kitchens, places for relaxation – each requiring a accidents.
different kind of lighting. Some spaces must follow specific criteria while other areas can
be illuminated with much more freedom. Besides visual comfort, people’s wellbeing and Discomfort
safety are important considerations and lighting can also be directly linked to productivity.
DIRECT (A): Bright lamps – measurable and has
a clear affect to performance UGR Glare Criterion
Today’s advanced electronic controls can follow different phases of the day and balance REFLECTED (B & C): Reflection of light on specular high
gloss surfaces 10 and under Imperceptible
artificial lighting levels with natural light. Using warmer
tones and low intensity at the beginning and end of A B C
the day can lower stress, and using cooler
tones during the day can be energizing.
13 Barely perceptible
Perceptible (suitable for
This is all part of Human Centric TYPES OF 16
accurate eye tasks)
Lighting philosophy and is GLARE
Barely acceptable (suitable
very important, even
vital, especially
19
for average eye tasks)
indoors where 22
Unacceptable (suitable for
we spend many moderate eye tasks)
hours a day DISABILITY: Affects visual performance – can be Barely uncomfortable (suit-
25
in artificially lit measured able for simple eye tasks)
DISCOMFORT: Subjective evaluation; feels uncomfortable
environments. but does not necessarily affect visual 28 and over Uncomfortable
performance
HOW TO REDUCE GLARE
LIGHTING LEVEL COLOUR
CE C RENDERING BEAM SURFACE VISIBILITY
N
Limit light intensity above More uniform surface Shading and shielding
O
A
M
M
potential glare angles luminance with same lumen
OR
FO
output
PERF
RT
GLARE
GOOD UNIFORMITY
KUV
LIGHTING
37o
DIRECTION
SHADOWS OUTPUT PLACEMENT AMBIENT LIGHT
COLOUR Decrease light output Avoid glare on task area Less contrast Eyes adapt to
AMB I NCE (might require adding more and increase ambient light brightness more easily
E luminaires)
80%
TAKE VISUAL PERFORMANCE, VISUAL COMFORT AND VISUAL AMBIENCE
INTO ACCOUNT TO ACHIEVE THE RIGHT LIGHT FOR SPECIFIC SPACE
TIPS FOR MODERN AND PLEASANT OFFICE LIGHTING 3 LINEAR OFFICE
LIGHTING SETUPS Check more details at www.ledil.com/application-areas/office-lighting/
AIM HIGH
Studies show that good office lighting increases productivity and wellbeing as well as boosting
creativity. They also show that people place great value on good workplace lighting and many are
unhappy with their current office lighting. Controlling lighting to replicate natural daylight patterns
helps peoples natural circadian rhythm improving overall wellbeing, motivation and productivity.
DESIGN FOR THE ENVIRONMENT
Applying the traditional room-related lighting concept of a 500 lux blanket no longer
meets the needs of the modern office or the modern worker, both of which
require variety and contrast. Thanks to LED technology, office lighting can be
designed to enhance atmosphere and décor as well as create contrasts
5
and different moods. This in turn allows much greater flexibility when
designing the overall office layout than would be possible with a
traditional 500 lux blanket.
ROOM RELATED LIGHTING CONCEPT WITH RECESSED DIRECT LIGHT
DARK LIGHT, BRIGHT SURFACE, OR INDIRECT?
Many offices are lit with bright surface luminaires. This is often
perfectly adequate in spaces that have a lot of natural day
light and light-coloured décor. However, in many cases this
type of lighting is not ideal as it also creates unpleasant
TIPS FOR
glare.
Well-shielded dark light luminaires on the other hand are
BETTER discreet, and the distracting light source cannot be seen,
even when they are on. Dark light creates a much more
OFFICE pleasant and natural working environment by eliminating
distracting bright luminaires that often dominate the
LIGHTING
workspace.
Indirect light can be used to create different moods and
effects depending on requirement and task. However in many
environments it is ideal to combine indirect light such as wall TASK RELATED LIGHTING CONCEPT WITH SUSPENDED LUMINAIRES
washers and up-light with direct lighting. This will create a bright and
airy atmosphere while reducing glare from bright luminaires.
LUMINAIRE PLACEMENT
Luminaires in a typical open office are often placed next to walls to achieve
sufficient lighting levels on the walls. However, when desks are placed in the office
lighting is not always a consideration, and some employees might find they are subjected to direct
and indirect glare. A good office and lighting design plan is essential to ensure light can be adjusted
according to the task and the individual.
MINIATURIZATION
LEDs enable smaller, modern and fresh designs for a lower cost. However such designs can be too
bright and cause glare if suitable optics designed for office environments are not used. Miniaturized
designs with a full range of beams gives you the tools to be more creative than ever.
RECEPTION LIGHTING - FIRST IMPRESSION MATTERS
DAISY
FLORENTINA
Discreet direct light for meeting rooms, receptions,
task lights and down lights.
Part of LEDiL’s Dark Light (UGR
TYPICAL OFFICE LUMINAIRES
DIRECT / INDIRECT
DIRECT LIGHTING INDIRECT LIGHTING LIGHTING
Recessed or surface mounted Suspended luminaire Suspended luminaire
TASK LIGHTING WALL-WASHING
Track light, downlight or free standing Recessed, surface mounted
or cove light
TECHNICAL SUPPORT
Simulations to show optic
performance in real applications Ledil Oy
Joensuunkatu 13
24100 SALO
FINLAND
Installation guides and tips
Ledil, Inc.
228 West Page Street Suite D
Thermal analysis for luminaire designs Sycamore IL 60178
USA
Ledil Optics Technology (Shenzhen) Co., Ltd.
Free for all our customers # 405 , Block B
Casic Motor Building
Shenzhen 518057
P.R.CHINA
tech.support@ledil.com (GLOBAL) www.ledil.com
tech.support.us@ledil.com (NORTH AMERICA)
The information contained herein is the
tech.support.rus@ledil.com (RUSSIA) property of LEDiL Oy, Joensuunkatu
13, FI-24100 SALO, Finland, and
is subject to change without prior
notice. Please visit www.ledil.com for
additional information, such as the
latest photometric files, 3D mechanical
models, and application notes relating
to handling, gluing and taping. LEDiL
products are IPR protected.
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